Pentaacetate of D-glucose reaction with NH2OH justifies the:
1.
Absence of aldehyde group.
2.
Presence of ketone group.
3.
Presence of aldehyde group.
4.
Presence of alcohol group.
Subtopic: Carbohydrates - Classification & D-L configuration |
From NCERT
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Which statement accurately describes the behavior of water in an egg when boiled?:
1. Precipitated out.
2. Adsorbed by the coagulated protein.
3. Absorbed by the eggshell.
4. Both (1) and (3)
1. Precipitated out.
2. Adsorbed by the coagulated protein.
3. Absorbed by the eggshell.
4. Both (1) and (3)
Subtopic: Denaturation of Proteins & Chemical Properties |
66%
From NCERT
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RNA upon hydrolysis, generates different quantities of different bases. It shows that RNA is :
1. Doubly - stranded.
2. Single - stranded.
3. Triple - helical in structure.
4. Having deoxyribose sugar.
1. Doubly - stranded.
2. Single - stranded.
3. Triple - helical in structure.
4. Having deoxyribose sugar.
Subtopic: DNA, RNA & Metal Ions |
87%
From NCERT
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Subtopic: Carbohydrates - Classification & D-L configuration |
70%
From NCERT
NEET - 2022
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The incorrect statement about the denaturation of proteins is:
| 1. | It results due to change of temperature and pH. |
| 2. | It results in the loss of biological activity of proteins. |
| 3. | A protein is formed from amino acids linked by peptide bonds. |
| 4. | Uncoiling of the helical structure takes place. |
Subtopic: Denaturation of Proteins & Chemical Properties |
68%
From NCERT
NEET - 2022
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The RBC deficiency is a deficiency disease of:
| 1. | Vitamin B1 | 2. | Vitamin B2 |
| 3. | Vitamin B12 | 4. | Vitamin B6 |
Subtopic: Vitamins, Hormones & Enzymes |
86%
From NCERT
NEET - 2021
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Given below are two statements:
In the light of the above statements choose the correct answer from the options given below:
| Statement I: | A unit formed by the attachment of a base to 1' position of sugar is known as a nucleoside. |
| Statement II: | When nucleoside is linked to phosphorous acid at 5' position of sugar moiety, we get nucleotide. |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are true. |
| 3. | Both Statement I and Statement II are false. |
| 4. | Statement I is true but Statement II is false. |
Subtopic: DNA, RNA & Metal Ions |
From NCERT
NEET - 2023
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Cheilosis occurs due to the deficiency of:
| 1. | Thiamine | 2. | Nicotinamide |
| 3. | Pyridoxamine | 4. | Riboflavin |
Subtopic: Vitamins, Hormones & Enzymes |
70%
From NCERT
NEET - 2023
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Consider the following statements:
| a. | Proteins are synthesized by various RNA molecules in the cell and commands for protein synthesis are present in DNA. |
| b. | RNA contains β-D-ribose and DNA contains β-D-2-deoxyribose. |
| c. | RNA contains thymine and DNA contains uracil. |
| d. | RNA molecules are of three types, that is, messenger RNA, ribosomal RNA, and transfer RNA |
The incorrect statement(s) are:
1. a, b and d
2. Only a and b
3. Only d
4. Only c
Subtopic: DNA, RNA & Metal Ions |
74%
From NCERT
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Consider the following statements.
a. In fibrous protein, polypeptide chains run parallel and are held together by hydrogen and disulphide bonds.
b. Globular protein is formed when polypeptides coil around to give a spherical shape.
c. Globular proteins are insoluble in water but fibrous proteins are soluble in water.
d. Fibrous proteins and globular proteins examples are keratin and albumins respectively.
The incorrect statement is
1. d
2. c
3. b
4. a
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
74%
From NCERT
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